How to setup bridging

I am evaluating your software to be used in a test environment. I am trying to create a virtual masking running 2003 Server that shall serve as bridge between test computers and a sql-server.

The 2003 Server has two network adapters (shows up in the device manager). In the Connection emulator bridging dialog there are only two options "Local Area Connection" and "WAN Network Interface (IP)"

I see a similar problem: the windows XP OS recognizes two LAN interface cards. the SoftPerfect Emulator software does not recognize the second card and therefore is not available under bridging.
Could this be because we are using a trial version of the software ?

We're having troubles trying to setup our WAN testing platform, using CE on a WinXP machine that we want to make acting as our WAN link between 2 different subnets.
Our need is to have several machines on one side (feat. a Central site) and several machines on the other side (our remote site).

So we thought we could install CE on a machine with 2 network cards that we would bridge through CE (Tools menu). Despite adding routes manually, we can't ping the remote machines from the 'central' ones. Could it be that the CE bridging can't be used for that kind of configuration ?
Thanks in advance for any help on this matter.
Cheers,
Serge